So I was curious as to what the INT to magic attack formula was, mainly because when I was level 15 and equipped something with 10 int, I gained about 5 magic attack, but at lvl 35 equipping something with 10 int gives me about 14 magic attack… So what is this formula?, I asked myself!

Now, let’s plot this data on a graph, as
*percentage increase as a function of intelligence added

So we have our points:

(10, 2.84)
(22, 6.04)
(26, 7.22)
(33, 9.25)
(133, 36.88)

We find that it is a linear graph. y = mx + b

Using Excel/TI-84 Graphing Calculator Line of best fit, we find the slope to be m = 0.2770610229*
(and b = 0.033666, but this is negligible)

Conclusion: Because the slope of the graph of percentage increase as a function of intelligence added is ~0.277%, it can be said that for every 1 intelligence you add to your character, you get a +0.277% increase to your magic attack.